FRANKLIN INSTITUTE HAGLEY MUSEUM AND LIBRARY / COLUMBIA UNIVERSITY / NEW YORK ACADEMY OF MEDICINE PRINCETON UNIVERSITY / CHEMICAL HERITAGE FOUNDATION COLLEGE OF PHYSICIANS OF PHILADELPHIA / UNIVERSITY OF PENNSYLVANIA UNIVERSITY OF TORONTO / WAGNER FREE INSTITUTE OF SCIENCE / LINDA HALL LIBRARY / DREXEL UNIVERSITY / YALE UNIVERSITY / AMERICAN INSTITUTE OF PHYSICS / /
Holiday
Commonwealth Day / /
Organization
Pennsylvania’s Bureau of Charitable Organizations / Philadelphia Area Center for History of Science / /